Authentication of files using blockchain technology; Providing user authentication services using blockchain-based software technology for cryptocurrency transactions; Providing temporary use of online non-downloadable software for accessing, reading, and tracking information on a blockchain; Providing temporary use of online non-downloadable software for creating digital files using blockchain technology; Providing temporary use of online non-downloadable software for creating digital files authenticated by non-fungible tokens (NFTs); User authentication services using blockchain technology; Authentication of data in the field of works of art using blockchain technology; Authentication of data in the field of digital files using blockchain technology; Authentication of data in the field of audio files using blockchain technology; Authentication of data in the field of video files using blockchain technology; Authentication of data in the field of multimedia files using blockchain technology; Authentication of data in the field of financial transactions using blockchain technology; Providing temporary use of online non-downloadable software for accessing, reading, and tracking information in the field of financial transactions on a blockchain; User authentication services using blockchain technology for cryptocurrency transactions; Computer services, namely, creating an on-line virtual environment for trading digital files authenticated by non-fungible tokens (NFTs); Providing temporary use of nondownloadable web-based decentralized applications (DApps) for cryptocurrency trading; Providing online information, news and commentary in the field of files authenticated by nonfungible tokens (NFTs); Providing online information, news and commentary in the field of cryptocurrency